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MERSEN FUSE J TD FUSE 600V 150A AJT AJT150
The AJT150 fuse provides reliable, time-delay protection for circuits up to 600VAC and 500VDC, supporting high inrush current applications without nuisance opening. Features SmartSpot® visual indication for quick blown fuse identification.
£99.89
Why Choose the Mersen AJT150 Class J Time-Delay Fuse?
The Mersen AJT150 is a high-performance Class J time-delay fuse designed to provide dependable overcurrent protection for industrial and commercial electrical systems. As part of the established Amp-Trap 2000® AJT series, it combines advanced current-limiting performance with time-delay characteristics that accommodate temporary motor-starting and transformer inrush currents.
Engineered for demanding branch circuit and feeder applications, the AJT150 helps protect motors, transformers, switchgear, distribution equipment and industrial machinery against damaging overloads and short circuits. Its compact Class J construction supports space-efficient panel designs while providing a high interrupting capacity for reliable operation during severe electrical faults.
With a rated current of 150 A and voltage ratings of up to 600 V AC and 400 V DC, the AJT150 is suitable for motor control centres, power distribution panels, switchboards and OEM equipment. Its blade-style terminals provide secure installation in compatible Class J fuse holders and fused disconnect devices.
Key Advantages
- Heavy-duty Class J time-delay fuse for industrial circuit protection.
- 150 A current rating for feeders, motors and distribution systems.
- 600 V AC and 400 V DC voltage ratings.
- Time-delay performance accommodates temporary motor and transformer inrush currents.
- Current-limiting construction helps minimise damage to downstream equipment.
- Compact Class J format reduces control panel space requirements.
Key Features
- Mersen Amp-Trap 2000® AJT series.
- 150 A current rating.
- 600 V AC / 400 V DC rated voltage.
- Class J time-delay fuse.
- Blade-style terminal configuration.
- Advanced current-limiting design.
- SmartSpot® visual open-fuse indication.
- Suitable for branch circuits, feeders, motors and transformers.
Reliable Protection for Industrial Electrical Systems
The Mersen AJT series is engineered to tolerate temporary inrush currents generated by motors, transformers and other inductive loads while responding effectively to sustained overloads and short circuits. This performance helps prevent nuisance fuse operation while maintaining dependable protection for valuable electrical equipment.
The AJT150 limits the fault energy passed to downstream conductors and components, helping reduce thermal and mechanical stress during short-circuit conditions. This can improve electrical safety, minimise equipment damage and reduce costly disruption in industrial installations.
Typical Applications
- Industrial motor control centres.
- Electrical feeders and branch circuits.
- Transformer protection.
- Power distribution panels and switchboards.
- HVAC and refrigeration systems.
- OEM machinery and industrial automation equipment.
Technical Specifications
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| Fuse Indication | Visual indicator | |
|---|---|---|
| Current | 150 A | |
| Voltage | 600 V | |
| Fuse Type | UL class | |
| Fuse Class | Time delay | |
| Item number | AJT150 | |
| Description | Fuse AJT - Class J - Time-delay 600VAC 500VDC 150A Blade SmartSpot® Amp-Trap 2000® | |
| EAN/UPC Code | 782001962593 | |
| Rated voltage AC UL | 600 V | |
| Rated voltage DC UL | 500 V | |
| Frequency (Hz) | 50/60 Hz | |
| Ampere Rating | 150 A | |
| AC or DC | AC/DC | |
| Fuse Class | Class J | |
| Speed/Characteristic | Time Delay | |
| Mounting | Clip or Bolted | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Indication System | Yes | |
| Indication System Type | SmartSpot® | |
| Connection/Terminal Material | Brass | |
| Connection/Terminal Type | Blade | |
| Product Diameter | 41.3 mm | |
| Product Length | 146 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 0.3629 kg | |
| Sell Pack Width | 42.9 mm | |
| Sell Pack Length | 42.9 mm | |
| Sell Pack Height | 152.4 mm | |
| Product group | Low Voltage UL/CSA Fuses | |
| Body/Insulating Material | GMG | |
| Product Weight | 0.3465 kg | |
| HS Code | 85361090 | |
| Country of Manufacture | Mexico |
Frequently Asked Questions
What is the Mersen AJT150 used for?
The AJT150 protects industrial branch circuits, feeders, motors, transformers and power distribution equipment against overloads and short circuits.
What is the current rating of the AJT150?
The Mersen AJT150 has a rated current of 150 A.
What voltage is the AJT150 rated for?
The fuse is rated for applications up to 600 V AC and 400 V DC.
Why does the AJT150 have a time delay?
The time-delay characteristic allows temporary starting and inrush currents from motors and transformers without unnecessary fuse operation while maintaining protection against sustained overloads.
Does the AJT150 include a blown-fuse indicator?
Yes. The AJT150 incorporates a SmartSpot® visual open-fuse indicator to support faster maintenance and fault identification.
Trusted by Electrical Professionals Worldwide
Mersen Amp-Trap 2000® Class J fuses are widely specified by electrical engineers, panel builders and industrial maintenance professionals for dependable current limitation, compact installation and reliable overcurrent protection.
